The circle with respect to which an inverse curve is computed or relative to which inverse points are computed. In three dimensions, inverse points can be computed relative to an inversion sphere.
Inversion Circle
See also
Circle Power, Inverse Points, Inversion Center, Inversion Pole, Inversion Radius, Inversion Sphere, Inversive Distance, Midcircle, PolarExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Inversion Circle." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/InversionCircle.html